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(11)

EP 3 947 621 A1

(12)

(43) Date of publication: 09.02.2022 Bulletin 2022/06 (21) Application number: 20721890.0 (22) Date of filing: 27.03.2020

(51) International Patent Classification (IPC):  C11D 7/06(2006.01) C11D 7/26(2006.01) C11D 7/36(2006.01) C11D 7/10(2006.01) C11D 7/34(2006.01) C11D 3/00(2006.01) (52) Cooperative Patent Classification (CPC): C02F 5/145; C02F 2103/023; C02F 5/105 (86) International application number: PCT/US2020/025158 (87) International publication number: WO 2020/205490 (08.10.2020 Gazette 2020/41)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 30.03.2019 US 201962827005 P (71) Applicant: BL Technologies, Inc. Minnetonka MN 55343 (US)	(72) Inventors: CLEMENS, Janine Minnetonka, Minnesota 55343 (US) HENDEL, Robert Minnetonka, Minnesota 55343 (US) FRAIL, Paul Minnetonka, Minnesota 55343 (US) BARRON, Judy Minnetonka, Minnesota 55343 (US) (74) Representative: Marks & Clerk France  Immeuble "Visium" 22, avenue Aristide Briand 94117 Arcueil Cedex 94117 Arcueil Cedex (FR)